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endian.h revision 1.5 
      1 /* $NetBSD: endian.h,v 1.5 1997/10/09 15:42:19 bouyer Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1987, 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)endian.h	8.1 (Berkeley) 6/10/93
     36  */
     37 
     38 #ifndef _ENDIAN_H_
     39 #define	_ENDIAN_H_
     40 
     41 /*
     42  * Define the order of 32-bit words in 64-bit words.
     43  */
     44 #define _QUAD_HIGHWORD 1
     45 #define _QUAD_LOWWORD 0
     46 
     47 #ifndef _POSIX_SOURCE
     48 /*
     49  * Definitions for byte order, according to byte significance from low
     50  * address to high.
     51  */
     52 #define	LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
     53 #define	BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
     54 #define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */
     55 
     56 #define	BYTE_ORDER	LITTLE_ENDIAN
     57 
     58 #include <sys/cdefs.h>
     59 
     60 typedef u_int32_t in_addr_t;
     61 typedef u_int16_t in_port_t;
     62 
     63 __BEGIN_DECLS
     64 in_addr_t	htonl __P((in_addr_t));
     65 in_port_t	htons __P((in_port_t));
     66 in_addr_t	ntohl __P((in_addr_t));
     67 in_port_t	ntohs __P((in_port_t));
     68 u_int16_t	bswap16 __P((u_int16_t));
     69 u_int32_t	bswap32 __P((u_int32_t));
     70 u_int64_t	bswap64 __P((u_int64_t));
     71 __END_DECLS
     72 
     73 /*
     74  * Macros for network/external number representation conversion.
     75  */
     76 #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
     77 #define	ntohl(x)	(x)
     78 #define	ntohs(x)	(x)
     79 #define	htonl(x)	(x)
     80 #define	htons(x)	(x)
     81 
     82 #define	NTOHL(x)	(x)
     83 #define	NTOHS(x)	(x)
     84 #define	HTONL(x)	(x)
     85 #define	HTONS(x)	(x)
     86 
     87 #else
     88 
     89 #define	NTOHL(x)	(x) = ntohl((in_addr_t)x)
     90 #define	NTOHS(x)	(x) = ntohs((in_port_t)x)
     91 #define	HTONL(x)	(x) = htonl((in_addr_t)x)
     92 #define	HTONS(x)	(x) = htons((in_port_t)x)
     93 #endif
     94 #endif /* !_POSIX_SOURCE */
     95 #endif /* !_ENDIAN_H_ */
     96